Sign a PDF

Add your signature to contracts, forms and letters without printing them. Draw it, type it or upload a picture, then drag it into place.

Uploaded to servers0 B
Processed locally0 B
Signature
Color
Sign here with your mouse or finger
Or click the page below. Drag a signature to move it; drag its corner to resize.

Why your files stay on your device

Nothing is uploaded

Most online PDF sites send your file to their servers. PDFMoss does the work inside your browser, so there is nothing to intercept, store or leak.

No limits on uses

There are no daily caps because there are no servers doing the work. Use any tool as often as you like.

Works on your phone

Every tool works on iPhone and Android: pick photos from your gallery and sign with your finger.

Original quality, works offline

Pages and images keep their quality, and once you install the app the tools work without an internet connection.

How to sign a PDF

  1. Drop a PDF on the page or click to choose it.
  2. Draw, type or upload your signature, then click the page where it belongs.
  3. Drag and resize it, then click Export signed PDF.

Frequently asked questions

Is this a legally binding signature?

It adds an image of your signature, which many everyday agreements accept. It is not a certificate-based digital signature; check what your document requires.

Can I sign on my phone?

Yes. Sign with your finger, tap the page to place the signature, and drag the corner to resize it.

Can I sign several pages?

Yes. Move between pages and place as many signatures as you need before exporting.

Are my files uploaded to a server?

No. PDFMoss processes files inside your browser. The counter at the top of the page shows 0 B uploaded because nothing is sent.

Is PDFMoss free?

Yes. Every tool is free to use with no sign-up and no watermark on your files.

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